Soldering iron



March 1928.

R, MAGRISSO SOLDERING IRON Filed Aug. 11, 1925 m T m. V m

IA'ITORNEY .Patented Mar. 27, 1928.

UNITED stares}.

RAFAEL MAGRISSO,

or NEW YORK, n. Y.

SOLDEBING I'non.

Application filed August The invention relates to soldering irons, and more particularly to soldering irons of the self-heating type using gaseous fuel.

Objects of the invention are to provide a self-heating soldering iron which shall be highly efficient and economical in operation and simple and inexpensive in construction. These and other objects of the invention will he inore fully. set forth in the following description.

'The invention consists in the novel combinationsfand features of construction herein shown and described.

In'the accompanying drawings, which are referred to-herein and form part hereof, is illustrated a preferred embodiment of the invention, the same serving in connection with the description herein to set forth the features of the invention.

Of the drawings: 1

Fig. 1 is a side elevation of a self-heating soldering iron made in accordance with the principles of the invention;

Fig. 2is a horizontal cross section taken on the line 2 2 of Fig. 1; 1 j Fig. 3 is a vertical section taken on the line 33 of Fig. 1;

Fig. 1 is a fragmentary view partly in elevation and partly incross section of the valve employed for adjusting the flow of gas tod'ifferent sizes of'bits; and- Fig. 5 is a vertical cross section taken on the line 5-5 of Fig.4.

Referring now in detail to the drawings, there is illustrated therein a preferred embodiment of the invention, the same comprising a Bunsen burner 7, having at its rear end an an mixlng chamber 8. Thls. chamber,

as shown, is rather spherical in form and is of greater cross-sectional area than the tube 7 of the burner. Said chamber 8 is formed with an air-port 9 therein through which air is supplied.

At the opposite or forward end of the burner 7 is a combustion chamber 11, the sides 12 and 13 of which are formed-by continuations of the sides of said burner 7. At their forward ends the said sides 12 and 13 are sprung apart to engage between them a bit 14: which forms the forward wall of the combustion chamber 11 and which is heated by the flames in said combustion chamber. Thebit is made of suitable material, as copper. As different sizes of bits are used in varying conditions of ork, it is desirable 11, 1925. SeiialNo. 49,552.

that the bits should be detachably engaged in the iron. While this may be done in various ways, as shown, the bit and adjacent parts are formed with orifices therethrough and a bolt 16 is passed through said orifices and securely held in place. It is necessary also insome kinds of work to have the bit placedin the iron so thatit extends longitudinally and horizontally therefrom instead of downwardly and at'right angles thereto, as shown in Figs. 1 and 3, and it will be noted that by securing the bit in the iron in the manner above described'this result can be obtained. The combustion chamber is formed with an openinglf in the bottom thereof see Figs. 1 and 2, and through this opening secondary air to support combustion I issupplied. The opening in thetop of the combustion chamber between the sides 12 and 13 thereof is somewhat longer than the bottom'opening 17 but is covered-with a shield 18 which, in the form shown in the drawings, extends in front of the bit,"and below the sides 12 and 13 0f the combustion chamber, and, as stated, covers the top of said chamber. It willalso be observed, see Fig. 1, that the front wall of the shield slopes away from the front. of the bit, thus a providing a recess or space into which heat currents from the combustion chamber will flow and thus heat the forward side of the bit as well as the rear side. The combustion of the gaseous fuel is so efficient, due to the nice proportions and arrangements of the parts and to the exact proportions of air and gas in the fuel mixture, a feature which will be presently referred to, that the products of combustion can escape through the spaces between the bit 14, the sides 12and 13, and the shield 18, and the body of the iron.

Gas is supplied to the air mixing chamber 8, from any suitable source of supply, through a tube 19 which is formed at its entrance to said air mixing chamber 8 with a constricted opening 21, see Fig. 4, through which the gas flows into the burner in a fine stream, being completely enveloped-in air as it flows through the air mixing chamber and tube of the burner to the combustion cham ber.; It will be noted that this' constricted opening 21 is large enough to supply the maximum volume of gas required to pro duce sufficient heat efficiently and quickly to heat the largest size bit which may be used with the iron. In order to furnish the volnine of gas supply for the proper heating of smaller bits, means are provided for regulating the supply of gas to the demands of various sizes of bits, said means, as shown, see Figs. 4 and 5, comprising a needle valve 22 which is projected into and retracted from the said opening 21 to the required degree by means of the crank pin 23 mounted on a crank disc 31 and reciprocating in a peripheral groove 34 formed in the body of the needle 22. The crank disc 31 is mounted on the inner end of a shaft 24, having a handle 26, the turning of which shaft 24; turns the crank disc 31 which reciprocates the pin 23, which in turn reciprocates the needle valve 22. Said valve 22 is formed with four ribs 32 thru the interstices between which the gas flows to issue from the constricted opening 21. It will be seen that the valve 22 having been set for the required amount of gas supply desired for any particular, condition of work, it may be left so set and the gas may be turned on and oil by a gas cock 27 situated in the rear of the Valve 22. A suitable handle 28 is provided,

7 the same, as shown, see Fig. 1, consisting of a cylinder of suitable material surrounding the pipe 19, and spaced therefrom, whereby said handle is insulated and kept cool. A flexible gas pipe 29 from any suitable source of gas supply may be attached to the rear of the pipe in the customary manner.

It will be seen that a self-heating soldering iron constructed as described and illustrated will carry out the objects of the invention as heretofore set forth, besides possessing other advantages which will be apparent to those skilled in the art. In its broader aspects the invention is not limited to the precise construction shown and described, as many changes may be made in the details thereof without departing from the main principles of the invention or sacrificing its chief advantages.

- I claim:

1. A self-heating soldering iron including. in combination, a Bunsen burner, and a comv of said sides forming the end wall of the chamber, and a shield covering said sides and forming the top of the chamber.

2. A self-heating soldering iron including in combination, a Bunsen burner, a combustion chamber at one end of said burner, said chamber being formed with a'bottom opening and having its'sides formed by projections from said burner, a bit held 'by said projections and forming the end wall of said chamber, an air mixing chamber at the other end of said burner equal to or greater than said burner in cross-sectional area, a gas supply pipe leading into said mixing chamber a handle surrounding a portion of the gas supply pipe, a valve for adjusting the supply of gas to said mixing chamber and located between said chamber and the handle, a gas cook for turning on and cutting off the gas supply and located between said valve and the handle. 1

3. A self-heating soldering iron including a Bunsen burner, a combustion chamber at one end thereof and having side walls, a bit supported in said side Walls and forming an end wall of said chamber, a shield mounted on said side walls and forming the top of said chamber, and a common mounting means for said bit and said shield.

In testimony whereof, I have affixed my signature hereto.

RAFAEL- MAGRISSO. 

